void main() {
  Person person = Person();
  person.name = "Tom";
  person.age = 10;

  var result = person("Test", 20);
  print("result===>$result");
}

class Person {
  late String name;
  late int age;

  int call(String name, int age) {
    print("Name is $name,Age is $age");
    return 3;
  }
}